Protagonist:

Helper of the protagonist:

Antagonist:

Remains 58

Chapter 1:

Victim:

Killer:

Chapter 1 end

Remains 56

Chapter 2:

Did not show up for dinner:

Victim:

Killer:

Chapter 2 end

Remains 54

Chapter 3:

Had a breakdown:

Victim:

Other victim:

Killer:

Chapter 3 end

Remains 51

Chapter 4:

Someone stole their stuff:

The thief:

Victim:

Killer:

Chapter 4 end

Remains 49